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<h2><a name="SECTION0020640000000000000000"></a><a name="http-redirect-handler"></a>
<br>
18.6.4 HTTPRedirectHandler Objects 
</h2>

<p>
<span class="note"><b class="label">Note:</b>
Some HTTP redirections require action from this module's client
  code.  If this is the case, <tt class="exception">HTTPError</tt> is raised.  See
  <a class="rfc" id='rfcref-102857' xml:id='rfcref-102857'
href="http://www.faqs.org/rfcs/rfc2616.html">RFC 2616</a> for details of the precise meanings of the various
  redirection codes.</span>

<p>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3980' xml:id='l2h-3980' class="method">redirect_request</tt></b>(</nobr></td>
  <td><var>req,
                                                  fp, code, msg, hdrs</var>)</td></tr></table></dt>
<dd>
Return a <tt class="class">Request</tt> or <code>None</code> in response to a redirect.
This is called by the default implementations of the
<tt class="method">http_error_30*()</tt> methods when a redirection is received from
the server.  If a redirection should take place, return a new
<tt class="class">Request</tt> to allow <tt class="method">http_error_30*()</tt> to perform the
redirect.  Otherwise, raise <tt class="exception">HTTPError</tt> if no other handler
should try to handle this URL, or return <code>None</code> if you can't but
another handler might.

<p>
<div class="note"><b class="label">Note:</b>
The default implementation of this method does not strictly
 follow <a class="rfc" id='rfcref-102864' xml:id='rfcref-102864'
href="http://www.faqs.org/rfcs/rfc2616.html">RFC 2616</a>, which says that 301 and 302 responses to <code>POST</code>
 requests must not be automatically redirected without confirmation by
 the user.  In reality, browsers do allow automatic redirection of
 these responses, changing the POST to a <code>GET</code>, and the default
 implementation reproduces this behavior.
</div>
</dl>

<p>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3981' xml:id='l2h-3981' class="method">http_error_301</tt></b>(</nobr></td>
  <td><var>req,
                                                  fp, code, msg, hdrs</var>)</td></tr></table></dt>
<dd>
Redirect to the <code>Location:</code> URL.  This method is called by
the parent <tt class="class">OpenerDirector</tt> when getting an HTTP
`moved permanently' response.
</dl>

<p>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3982' xml:id='l2h-3982' class="method">http_error_302</tt></b>(</nobr></td>
  <td><var>req,
                                                  fp, code, msg, hdrs</var>)</td></tr></table></dt>
<dd>
The same as <tt class="method">http_error_301()</tt>, but called for the
`found' response.
</dl>

<p>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3983' xml:id='l2h-3983' class="method">http_error_303</tt></b>(</nobr></td>
  <td><var>req,
                                                  fp, code, msg, hdrs</var>)</td></tr></table></dt>
<dd>
The same as <tt class="method">http_error_301()</tt>, but called for the
`see other' response.
</dl>

<p>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-3984' xml:id='l2h-3984' class="method">http_error_307</tt></b>(</nobr></td>
  <td><var>req,
                                                  fp, code, msg, hdrs</var>)</td></tr></table></dt>
<dd>
The same as <tt class="method">http_error_301()</tt>, but called for the
`temporary redirect' response.
</dl>

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